Lammbda.com is a browser hijacker coming to the PC without the user's consent and changing the settings of all the browsers installed in your system, such as Chrome, Mozilla, IE, and others. This sets https://lammbda.com/ as the default homepage and search engine.
If you notice that the browser homepage and the search engine is changed to https://foobaroo.com/index.php?a=web&q=, then most likely it means that your browsers have been attacked by Foobaroo.com.
POLICJA!!! Ransomware is a cryptovirus, in other words, an extortioner encrypting user files using AES algorithms. It attacks many user files (PDF files, office documents, archives, multimedia files and so on) and makes them unusable for further use, changing its extensions to .##___POLICJA!!!___TEN_PLIK_ZOSTA.
CryptoLite is another cryptovirus, to extorting money from unsuspecting users. The virus encrypts almost all the files that are most important to the user. Video files, audio, archives, MS documents Office or other text files and tables, and much more can be encrypted. These files become unusable because CryptoLite changes its extension by adding .encrypted.
Slicksearch.com is fake search engine, called browser hijacker. After penetration of an Internet browser, it changes the settings of the homepage and replaces the search engine on own one. This search engine may seem normal, as it looks modern and offers familiar features for searching as Google, Yahoo or Bing but, in fact, it is annoying unwanted software, endangering the safety of your personal data.